Urien Rakarth
The....person known as Urien Rakarth is truly one of the sickest freaks within the 40,000 galaxy and we are talking the grimdarkness of the future.
He is one of the haemonculi, those fun loving Dark Eldar who enjoy nothing more then exploring the limits and boundary of your pain threshold, just for the sake of it (and their own perverted amusement/curiousity/boredom). Urien is amoungst the oldest of his brethean and a genius in his field, although this field be torture, flesh-sculpting and anatomical body muliplation. He no longer cares about the Dark Eldar's politics; he just wants to be depraved as possible now. He is utterly mad, often wandering around his labroratires gibbering crazily to himself.
How black a soul is he? He laughs at all the examples of 'horror' movies mankind makes. He shakes his head with paternal tolerance at the idea of human centipedge and simply asks is that all and suggests further ways to add it to. Anything taboo he yawns at and says been there, done that. There are Dark Eldar and then there is Urien Rakarth.
He has been reborn into new bodies countless times and actually now comes to relish the feeling of dying each time, just another experience to the crazed scientist. However, something has gone wrong in his reincarnating process or it could be his utterly twisted soul is now affecting his physical form but he is now as much as a monster in body as he is in mind and spirit. His spine is a twisting note that leaves his posture constantly slopping and he has multiple limbs, some decaying or dead, poking out of every angle. His face itself is now held onto his skull with pieces of leathery flesh. in a way he now resembles a puppet, his broken and yet functioning body moving at his commands despite it shouldn't being possible.
Despite his madness he is still as expert in his craft as ever, able to create constructs that outshine his felllows. His uber grotesgues are stronger, tougher, and, although it makes no sense considering what he must do to them, are saner and more able to follow commands. It is no surprise then he is still regarded as the most senior of the haemonculi masters.
It is believe Slaanesh is desperately trying to scout out his talent for a position at his palace as head torturer/plastic surgerion to the daemonettes. So far Urien has declinded these most generous offers but like with all Eldar, Slaanesh will actually get her man.